DK4UX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN49

Receiver-side FT8 activity involving DK4UX, decoded by SO8OO in southeastern Poland. 426 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, 10m, across 32 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-02.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 426 FT8 messages attributed to DK4UX as the transmitting token by decoded message structure across 32 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (69%), followed by 20 m (22%) and 10 m (7%). Most decodes (73%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13.8 dB.

Overview

426

Messages attributed

UTC dates decoded

Active 15-min windows

-13.8 dB

Estimated median S/N

Bands

60m · 11 40m · 295 20m · 92 10m · 28

First attributed message: 2026-06-10
Last attributed message: 2026-09-02 17:33 UTC

Observed FT8 message patterns

Attributed sample: 426 messages
Active dates: 32 UTC dates
Estimated median S/N: -13.8 dB
Estimated 10th-90th percentile: -20 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 157, moderate (-15 to -9 dB) 132, strong (≥ -8 dB) 137.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with DK4UX in decoded directed-looking exchanges:

VJ6X · Australia ×2 F5RAV · France ×2 BH2WTV · China F5IXN · France F5RRS · France RA9LL · Asiatic Russia RC9WC · Asiatic Russia RI1FJL · Franz Josef Land SP6AXW · Poland SV5BYP · Dodecanese TA3ZGR · Asiatic Turkey US2YW · Ukraine

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to DK4UX

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator: JN49 · 273 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 920 km (approx.)
Last such locator decoded: 2026-09-02 17:33 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Time UTC	Band	DK4UX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-02 17:32	40m	-1 / -	RC9WC	- / -	4	Partial capture
09-02 17:21	40m	+2 / -16	R2EA	-4 / -	7	✓ Closing observed
09-02 17:20	40m	- / -12	RX9ABI	-12 / -	2	✓ Closing fragment
08-28 06:43	20m	+2 / -	RI1FJL	- / -15	11	✓ Closing fragment
08-25 08:05	20m	+9 / -	VK4BLE	- / -	2	Partial capture
08-25 07:56	20m	+13 / -	YV5JLO	- / -16	3	✓ Closing fragment
08-23 16:58	20m	+2 / -	WA4FU	- / -20	11	Partial capture
08-22 17:52	40m	-3 / -	UN7PPV	- / -	17	Partial capture
08-16 16:50	40m	-15 / -	<...>	- / -	18	Partial capture
08-14 19:46	40m	-3 / -11	JA4FKX	-18 / -15	6	✓ Full exchange observed
08-14 19:44	40m	-3 / -	LY2MM	-8 / -4	6	✓ Closing observed
08-14 19:41	40m	-7 / -	EW8AAC	- / -21	4	✓ Closing fragment
08-14 19:33	60m	-8 / -	DL9DBZ	-5 / +3	5	✓ Full exchange observed
08-14 19:31	60m	-7 / -10	SV3CKF	-12 / -16	5	✓ Full exchange observed
08-14 19:28	60m	-14 / +2	F5RAV	-8 / -3	7	✓ Full exchange observed
08-14 19:28	60m	-11 / -5	G4ZFJ	-3 / -	8	✓ Closing observed
08-12 07:39	40m	-19 / -	<...>	- / -18	8	Partial capture
08-12 07:31	40m	-18 / -	KA1MXL	- / -	2	Partial capture
08-12 07:13	40m	-15 / -	G8ANJ	- / -11	3	✓ Closing fragment
08-12 07:12	40m	-18 / -	DG6TOM	- / -11	2	Partial capture
08-12 07:03	40m	-19 / -	CR5VP	- / -19	3	✓ Closing fragment
08-09 17:10	40m	-15 / -	YD2DFO	- / -	4	Partial capture
08-09 16:59	40m	-16 / -	YD2DFO	- / -	10	Partial capture
08-09 16:51	40m	-17 / -	YD2DFO	- / -	10	Partial capture
08-09 16:46	40m	-14 / -	M7CYY	- / -5	2	✓ Closing fragment
08-09 16:41	40m	-16 / -	PE1NPS	- / 0	2	Partial capture
08-09 16:35	40m	-16 / -8	UY0HY	-2 / -5	7	✓ Full exchange observed
08-09 08:31	20m	-17 / -	UA0SM	- / -	3	Partial capture
08-08 06:58	40m	-16 / -	PE1BOG	- / -13	4	Partial capture
08-08 06:54	40m	- / -	UR1CCT	-5 / -	2	✓ Closing fragment
08-06 05:57	40m	-20 / -	WA2HIP	- / -	3	Partial capture
08-05 17:25	40m	-12 / -	R8OAE	- / -	2	Partial capture
08-05 17:22	40m	-13 / -	RM8W	- / -	5	Partial capture
08-04 17:25	40m	-14 / -	RA9CIN	- / -8	2	✓ Closing fragment
08-04 17:18	40m	-11 / -	VK2WN	- / -13	5	✓ Closing fragment
07-31 19:37	20m	-13 / -	BH2WTV	- / -19	7	✓ Closing fragment
07-30 05:42	40m	-22 / -	DL7DL	-14 / -	7	✓ Closing observed
07-30 05:39	40m	-21 / -	W5BUC	- / -23	9	Partial capture
07-30 05:38	40m	-20 / -	HI8UD	- / -	3	Partial capture
07-23 17:22	40m	-13 / -	UN3P	- / -	3	Partial capture
07-23 17:17	40m	-10 / -	RA0SCA	- / -	5	Partial capture
07-22 17:48	40m	-22 / -	SM5WXF	- / -	2	✓ Closing fragment
07-14 14:47	20m	-14 / -	YB1DFE	- / -18	4	✓ Closing fragment
07-14 14:42	20m	-20 / -	RA9LL	- / -8	2	✓ Closing fragment
07-11 06:45	40m	-19 / -	WA2HIP	- / -	13	Partial capture
07-10 06:26	40m	-22 / -	ND9M	- / -	5	Partial capture
07-10 06:16	40m	-16 / -	IW0FGX	- / +2	3	✓ Closing fragment
07-10 06:11	40m	-20 / -	ZL4KX	- / -	2	Partial capture
07-09 17:50	40m	-9 / -	A61DD	- / -	4	Partial capture
07-09 17:38	40m	-10 / -	YH1AA	- / -7	8	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m

UTC    dB Audio  Message
180030  -4 1673  UN7PPV DK4UX JN49 (x2)
172045 -10 2677  DK4UX RX9ABI -12 (x2)
172145  +0 1033  DK4UX R2EA -16 (x2)
172400  +4 1669  R2EA DK4UX JN49 (x2)
172515  -5 1033  DK4UX R2EA -13 (x2)
172600  +1 1669  R2EA DK4UX 73
173215  -2 1669  RC9WC DK4UX JN49 (x4)

20m

UTC    dB Audio  Message
075745 +19  791  YV5JLO DK4UX 73
075800  -2  622  DK4UX F4AXK IN96
080545 +12  791  VK4BLE DK4UX JN49 (x2)
064345  +5 1336  RI1FJL DK4UX JN49 (x11)

60m

UTC    dB Audio  Message
193000  -6  933  DK4UX G4ZFJ JO01
193000  -8 1266  DK4UX F5RAV 73
193030  -7  933  DK4UX G4ZFJ R-05
193045 -11 2232  G4ZFJ DK4UX RR73
193100  -2  933  DK4UX G4ZFJ 73
193145  -6 2232  SV3CKF DK4UX JN49 (x2)
193230 -12 1925  DK4UX SV3CKF -10
193245  -7 2232  SV3CKF DK4UX R-16 (x2)
193330  -5 2160  DK4UX DL9DBZ JO31
193345  -8 2232  DL9DBZ DK4UX +03
193400  -6 2160  DK4UX DL9DBZ R+11
193415  -8 2232  DL9DBZ DK4UX RR73
193430  -5 2160  DK4UX DL9DBZ 73

10m

UTC    dB Audio  Message
160145  -6 1870  <...> DK4UX JN49 (x13)
092400  +0 2437  RC9WC DK4UX JN49 (x2)

Decoder S/N history by band

Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.

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